Porkbun are giving away the choice of a .dev or .app TLD (1yr)

Coupon is TESTANDCODE

I had already used it before realising it was one or the other, honestly its one of the better TLD's IMO, too bad Cloudflare doesn't support it yet.

Edit: I should have mentioned, you have to make a tentative payment of 1 USD, which is reverted.